Finding the Fourth Proportional to 1,192.01, 1,644.93 and 660.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,192.01 : 1,644.93 = 660.89 : x
2. Step 2: Convert to fraction form
   1,192.01/1,644.93 = 660.89/x
3. Step 3: Cross multiply
   1,192.01x = 1,644.93 × 660.89
4. Step 4: Simplify right side
   1,192.01x = 1,087,109.56
5. Step 5: Solve for x
   x = 1,087,109.56/1,192.01
6. Step 6: Final answer
   x = 912.00